Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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After
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AfterFast, Reliable Home Additions & ADU Across Grapevine
Adding a second story, an attached suite, or a detached ADU in Grapevine is a different animal than the same project two towns over in Keller or Euless. That’s not marketing talk. Grapevine sits in the shadow of DFW International Airport, and a meaningful share of the city’s residential lots fall within FAA height review zones or federal noise contours that impose real construction requirements, sound-rated windows, insulated wall assemblies, and aeronautical filings that a contractor from outside the metro rarely sees coming. Barrett & Sons Construction has been building additions and accessory dwelling units here long enough to know which streets trigger a height study and which don’t, and that knowledge is worth money on your project. Call (877) 610-1318 to schedule a free estimate, and ask us about the airport overlay before you even draw a line.
Key takeaways for a Grapevine addition or ADU:
- Attached additions run roughly $45,000-$130,000; detached ADUs run $90,000-$220,000; garage conversions run $30,000-$80,000.
- FAA Part 77 height review can apply to second-story additions and detached ADUs on lots near flight corridors, and we handle that paperwork.
- Grapevine’s expansive clay soil means your foundation plan matters more than your floor plan. We engineer for it.
- Every Barrett & Sons job includes permits pulled and a written 90-Day Done Right Promise.
Why Barrett & Sons Construction Is Grapevine’s Preferred Home Additions & ADU Company
We are not the franchise that dispatches a rotating cast of subcontractors to Grapevine from a call center in another state. Tom Barrett founded this company in 1998, and his sons run the crews that show up in Grapevine today. That means the person shaking your hand at the first site walk is the same person you’ll see at the hardware store on Saturday, and the same person who answers when something needs attention after the job is done. We live here, we work here, and our reputation on the streets of Grapevine is the only marketing that ever mattered to us.
Our Home Additions & ADU team has walked enough Grapevine properties to know that a 1990s home near Dove Park sits on different soil behavior than a 2000s build off Hall-Johnson Road, and that a two-story addition within the airport’s noise contour needs a different window package than one up in Southlake. That’s not a sales pitch. That’s the difference between a contractor who pulls permits in Grapevine monthly and one who drives in for a bid and then wings it. We carry premium window lines like Simonton, Ply Gem, and PGT specifically because they offer the STC-rated glass and laminated assemblies that Grapevine’s sound-attenuation requirements call for near the flight corridors.
Written change orders are how we work, end to end. Every allowance, every scope adjustment, every price change gets put on paper and signed by you before a single nail moves. Tom Barrett publishes his name, his address, and his license number. You can look all of it up before you sign anything, and we’d genuinely encourage you to. Ask anyone on your street or look up the license number yourself. Our 90-Day Done Right Promise means one call brings Tom back if something isn’t right.
Our Home Additions & ADU Services in Grapevine
ADU Design & Permitting in Grapevine
Detached ADU construction in Grapevine typically runs $90,000-$220,000, and the design and permitting phase sets the table for everything after. We handle the city’s permitting process, including the FAA aeronautical study when your lot falls within a height review zone, the Grapevine Historic Preservation Commission coordination if you’re near Main Street, and the structural engineering your post-tension slab needs before an addition goes vertical. A competent design phase catches the airport-overlay issues on paper, where a change costs hours, instead of on the job site, where a change costs weeks.
Garage Conversion ADU in Grapevine
A garage conversion is usually the most cost-effective path to a rental unit or multigenerational suite, and in Grapevine it runs $30,000-$80,000 depending on whether you’re adding a bathroom, a kitchenette, or both. Many 1980s and 1990s Grapevine garages sit on slabs that were never insulated or damp-proofed to living-space standards, so we regularly see moisture migration and slab-edge cracking that has to be corrected before framing begins. That’s not a corner we’ll cut, and it’s a line item you’ll see in writing before we start, not as a surprise at the end.
New Detached ADU in Grapevine
New detached ADUs in Grapevine run $90,000-$220,000, and these projects live or die by the site work. The Blackland Prairie clay under much of Grapevine swells and shrinks hard with wet-dry cycles, which makes grading, drainage, and foundation design non-negotiable. We engineer for that soil, schedule concrete pours around Grapevine’s sustained 100°F summer heat so the hydration is managed properly, and stage framing so it doesn’t sit exposed during the ice storms this DFW corridor sees most winters.
Junior ADU & Interior Conversion in Grapevine
A junior ADU, which is essentially an interior conversion with a private entrance and a kitchenette, is a smart option for Grapevine homeowners who want rental income or a parent suite without the site work of a detached unit. These conversions typically fall within the broader $45,000-$130,000 range, usually on the lower end unless you’re adding a second bath. We also handle interior conversion of attic space and bonus rooms, and if you’re touching the exterior shell near Historic Main Street, we’ll coordinate with the Historic Preservation Commission on your behalf. When a conversion changes how you use the rest of the house, we also bring in our Kitchen Remodeling in Grapevine team, and for the new or expanded bath, our Bathroom Remodeling in Grapevine crew handles the plumbing and tile so the whole project finishes together.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Grapevine
We stock and install Simonton, Ply Gem, and PGT window lines on Grapevine addition projects because the brand list matters when a city’s noise-attenuation standard tells you exactly what a window assembly has to do. PGT makes the impact-rated and laminated glass we’ve used on additions inside the DFW noise contours. Simonton and Ply Gem handle the mid-range and high-efficiency replacements on the quieter streets. We order these directly and stage them locally for Grapevine jobs, which tightens lead times and means a wrong-size window doesn’t sit on a dock in another time zone while your project idles.
Common Home Additions & ADU Problems We See in Grapevine Homes
- FAA height review surprises: A two-story addition or detached ADU on a lot near the DFW flight corridors can require an aeronautical study, and a rooftop HVAC platform that would sail through permitting in Euless can trigger a Notice to Airmen filing here. Contractors from outside the corridor get caught on this constantly. We check it first.
- Clay soil foundation behavior: Grapevine’s expansive Blackland Prairie clay changes volume dramatically with moisture, and additions that don’t account for it produce cracks at the tie-in point within a few seasons. We engineer the connection so your addition and your existing slab move together.
- Noise contour window specs: Homes inside DFW’s noise impact contours are subject to sound-attenuation construction requirements, and using the wrong glass is a code failure and a comfort failure. We spec STC-rated windows from day one.
- Historic Main Street coordination: If your property falls within the 1880s-1920s historic district, any exterior alteration needs Grapevine Historic Preservation Commission review before permits. We’ve handled that process enough times to schedule for it instead of discovering it at the counter.
Pricing for Home Additions & ADU in Grapevine, TX
A typical attached home addition in Grapevine runs $45,000-$130,000. Detached ADUs run $90,000-$220,000. Garage conversions run $30,000-$80,000. Those ranges cover most of what we build here, and the biggest variables are foundation depth, airport-overlay compliance, window packages, and the finish level inside. A two-story addition near the flight corridor with PGT impact glass will land at the upper end. A single-story bump-out on interior Hall-Johnson with standard Simonton windows lands at the lower end. We quote fixed prices after a site walk, every change order arrives in writing before the work happens, and the free estimate is genuinely free. No trip charge inside the county, and a permanent 10% senior and veteran discount applies to every job.
We Also Serve Cities Near Grapevine
The same crews that build additions and ADUs in Grapevine also cover Southlake, Colleyville, Coppell, and Euless. Each of those cities has its own building department and, for Southlake and Colleyville specifically, far less exposure to the airport overlays we navigate daily in Home Additions & ADU in Grapevine. If you live just outside the city line, we’ll bring the same written change orders and the same 90-Day Done Right Promise to your project.
Serving Grapevine, TX - Our Local Coverage Area
We’re based in the Grapevine area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Home Additions & ADU in Grapevine
An attached home addition in Grapevine typically costs $45,000-$130,000, while a detached ADU runs $90,000-$220,000 and a garage conversion runs $30,000-$80,000. Foundation work, FAA height review compliance, window packages, and interior finish level move the number within those ranges. Call (877) 610-1318 for an exact quote, and remember our free second opinion offer applies to any written estimate you’ve already received.
It won’t, unless you change the scope, and if you do, the new price arrives as a written change order before the extra work starts. We don’t do verbal allowances or end-of-job surprises. That’s the whole point of putting every allowance and every change in writing ahead of the nail.
Yes, on every eligible job we pull the permits and sign the inspections. In Grapevine, that can also mean FAA height review filings, noise contour compliance documentation, and Historic Preservation Commission coordination, all of which we handle as part of the permit package. The permit inspector works for you, not for me, and that’s exactly why I like him.
The honest answer is that Grapevine’s airport overlays add a layer of engineering, filing, and material specification that neighboring cities simply don’t have. STC-rated windows, insulated wall assemblies, and occasional FAA aeronautical studies are real costs with real documentation behind them. You’re not paying a Grapevine premium; you’re paying for a building that meets Grapevine’s actual code.
Every Barrett & Sons job carries the written 90-Day Done Right Promise: one call brings Tom back to make it right if it isn’t done right. No fine print, no claim forms. We also pass through the manufacturer warranties on the named materials we install, and you’ll have those documents in your hand before final payment is due.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Grapevine and the surrounding DFW corridor since 1998.
Call (877) 610-1318 to schedule your free Grapevine home addition or ADU estimate. A live person answers the phone 24/7, and Tom Barrett’s name, address, and license number are published and verifiable. Look it up before you sign anything.